Description
Mozilla Firefox before 3.5.19 and 3.6.x before 3.6.17, and SeaMonkey before 2.0.14, does not properly use nsTreeRange data structures, which allows remote attackers to execute arbitrary code via unspecified vectors that lead to a "dangling pointer."
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | iceape | 2.0.11-5 | DSA-2227-1 |
| Debian 6.0 | icedove | 3.0.11-1+squeeze2 | DSA-2235-1 |
| Debian 6.0 | iceweasel | 3.5.16-7 | DSA-2228-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | firefox | 3.6.17-1.el6_0 | RHSA-2011:0471 |
| RHEL 6 | thunderbird | 3.1.10-1.el6_0 | RHSA-2011:0475 |
| RHEL 6 | xulrunner +1 | 1.9.2.17-4.el6_0 | RHSA-2011:0471 |
| RHEL 5 | firefox | 3.6.17-1.el5_6 | RHSA-2011:0471 |
| RHEL 5 | thunderbird | 2.0.0.24-17.el5_6 | RHSA-2011:0474 |
| RHEL 5 | xulrunner +1 | 1.9.2.17-3.el5_6 | RHSA-2011:0471 |
| RHEL 4 | firefox | 3.6.17-2.el4 | RHSA-2011:0471 |
| RHEL 4 | seamonkey +5 | 1.0.9-70.el4_8 | RHSA-2011:0473 |
| RHEL 4 | thunderbird | 1.5.0.12-38.el4 | RHSA-2011:0474 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Productivity 5 | thunderbird | 2.0.0.24-17.el5_6 | RHSA-2011:0474 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Metasploit 1 module
-
Mozilla Firefox "nsTreeRange" Dangling Pointer Vulnerability
exploit/windows/browser/mozilla_nstreerange
Exploit-DB 2
- Mozilla Firefox - 'nsTreeRange' Dangling Pointer (Metasploit) (1) EDB-17520 · remote · Jul 10, 2011 · verified
- Mozilla Firefox - 'nsTreeRange' Dangling Pointer (2) EDB-17419 · remote · Jun 20, 2011 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 7
- RHSA-2011:0475 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2011:0473 Red Hat Security Advisory: seamonkey security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2011:0474 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- RHSA-2011:0471 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 28, 2026
- DSA-2227-1 iceape - several Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2228-1 iceweasel - several Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-2235-1 icedove - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-2228 vendor-advisory
- oval:org.mitre.oval:def:14020 vdb-entry signature
- MDVSA-2011:079 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=630919
- http://www.mozilla.org/security/announce/2011/mfsa2011-13.html
- DSA-2235 vendor-advisory
- http://downloads.avaya.com/css/P8/documents/100134543
- DSA-2227 vendor-advisory
- http://downloads.avaya.com/css/P8/documents/100144158
- 8310 third-party-advisory